Servo mechanism responsive to the ratio of two fluid pressure signals
Abstract
Abstract THE INVENTION RELATES TO A SERVO-MECHANISM FOR PRODUCING AN OUTPUT MOVEMENT PROPORTIONAL TO A RATIO OF TWO FLUID PRESSURE SIGNALS. THE OUTPUT MOVEMENT IS PROVIDED BY THE DISPLACEMENT OF A PISTON IN A DOUBLE ACTING PISTON AND CYLINDER UNIT AND HAVING AN ORIFICE CONTROLLED BYPASS. PRESSURE DROP ACROSS THE BYPASS IS CONTROLLED BY A LEVER MOVABLE IN RESPONSE TO ONE OF THE SIGNALS AND ALSO IN RESPONSE TO THE FORCE EXERTED BY A SECOND LEVER VIA AN INTERCONNECTING MEMBER. THE SECOND LEVER IS MOVABLE IN RESPONSE TO THE DIFFERENCE BETWEEN THE TWO SIGNAL PRESSURES. THE POSITION OF THE INTERCONNECTING MEMBER IS CONTROLLED BY THE PISTON VIA A FEEDBACK MECHANISM. AN INTERCONNECTION OF THE FEEDBACK MECHANISM IS CONSTRAINED TO MOVE ALONG A CAM SURFACE, WHEREBY THE DISPLACEMENT OF THE PISTON CAN BE MADE A DESIRED FUNCTION OF THE RATIO OF THE TWO FLUID PRESSURE SIGNALS.
Inventors
- 👤 Harry Simister Bottoms
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |